- APositive voltage
- BZero voltage
- CLower voltage level
- DHigher voltage level
Explanation:
In digital logic, higher voltage is defined as logic state '1' and lower voltage is defined as logic state '0'. The higher voltage need not necessarily be positive. For example, it is possible that state '0' is defined as −10 V and state '1' is defined as −5 V.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In an electron gun the control grid is given a negative potential relative to cathode in order to
|
(a) Decelerate electrons |
|
(b) Repel electrons and thus to control the number of electrons passing through it |
|
(c) To select electrons of same velocity and to converge them along the axis |
|
(d) To decrease the kinetic energy of electrons |
Four plates of the same area of cross-section are joined as shown in the figure. The distance between each plate is d. The equivalent capacity across A and B will be

|
(a) |
(b) |
(c) |
(d) |
An electron moving towards the east enters a magnetic field directed towards the north. The force on the electron will be directed
|
(a) Vertically upward |
(b) Vertically downward |
|
(c) Towards the west |
(d) Towards the south |
Hubble's law states that the velocity with which the 'milky way' is moving away from the earth is proportional to
|
(a) Square of the distance of the milky way from the earth |
|
(b) Distance of milky way from the earth |
|
(c) Mass of the milky way |
|
(d) Product of the mass of the milky way and its distance from the earth |
In an FM system a 7 kHz signal modulates 108 MHz carrier so that frequency deviation is 50 kHz. The carrier swing is
|
(a) 7.143 |
(b) 8 |
(c) 0.71 |
(d) 350 |
In the figure given the value of X resistance will be, when the p.d. between B and D is zero
|
(a) 4 ohm |
(b) 6 ohm |
(c) 8 ohm |
(d) 9 ohm |
A coil of inductance 40 henry is connected in 0series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is
|
(a) 40 seconds |
(b) 20 seconds |
(c) 8 seconds |
(d) 5 seconds |